Advice for Denon X550BT which "trips" sometimes

vishalrao

vishalrao

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Hello folks!

I have a so-called 3-phase protector device fixed after my electricity meter box that cuts off supply for at least 2 minutes for over or under voltage, and I have a so-called pure sine wave inverter for whole-home backup in UPS mode which works well for all my devices in the house - TVs, my HTiB set, my PC, smaller stuff like wifi devices etc.

I have a Denon X550BT AVR/amp which will sometimes "trip" (make a click sound while "restarting" or toggling itself off and on) when the inverter kicks in to switchover and switch back (during power cuts or voltage goes out of its UPS-mode range) which seems like the AVR's power supply is very sensitive.

Is there a quick/simple solution I can apply to prevent this? Like some devices have power adapters (bricks) that apparently retain some charge for brief enough duration to withstand the inverter switching delay (even though it claims to be under 20ms) so these devices continue to work uninterrupted.

Any advice or suggestions?

Thank you!
 
Not an electrician/engineer, please do due diligence. Mains electricity is not to be played with. Has potential to kill.

I believe a capacitor should work here.

Use one that is rated for air-conditioners/fans at 220/440V AC.

They store charge when power is there and provide that burst of energy when there is a lack of power when the switching happens.

If it still trips after adding a capacitor, you can try adding another in parallel.

@Heisen & @rsaeon might be able to provide more inputs.

Edit - Fan capacitors can also be used, but they might not be enough to handle the power requirement of the amplifier.

The voltage rating can be anything higher than 220V AC, but not lower.

Edit 2 - Based this on my experience in the low voltage DC side of electronics.
 
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I might just get my electrician to take a look whether he has any ideas too.

I was wondering if some readily available gadget, like a laptop power brick but just connect between the AVR power cord and the mains power socket, no AC-to-DC conversion, might be feasible.
 
One sure way to fix this problem is by using an always online UPS, preferably from APC, since they do not work on switch-over type technology you get 0ms delay when the power goes out. Just make sure to plug the UPS into socket which is not powered by your inverter.
 
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I looked at those some years back but APC's online UPS are pricey. 30k odd. Good bit more than laptop brick OP is looking for.
 
blr_p said:
I looked at those some years back but APC's online UPS are pricey. 30k odd. Good bit more than laptop brick OP is looking for.
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Yes they are expensive the starting price is 20k but offers 0 ms delay, also batteries tend last longer in these UPS for some reason.

The line-interactive series from APC can also be tested, the basic model which costs about 3k, offers 10 ms typical and 12 ms maximum of transfer time. I am sure this will be much better that the OP's inverter transfer time which states 20ms but no one knows for sure what the actual time is.

I doubt the laptop brick type solution will work here, unless it is just a very tiny momentary voltage drop which is making the amplifier to reboot.

vishalrao said:
I might just get my electrician to take a look whether he has any ideas too.
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A battery powered oscilloscope is perfect for this scenario to measure the AC signal right at amplifier power pins, then you intentionally drop the main power switch of your home to simulate the switch to your inverter and observe the waveform and see what kind of delay are we getting or it is even a delay or something else. But all this is out of the scope of this thread.
 
Heisen said:
Yes they are expensive the starting price is 20k but offers 0 ms delay, also batteries tend last longer in these UPS for some reason.
Click to expand...
These are sine wave
Heisen said:
The line-interactive series from APC can also be tested, the basic model which costs about 3k, offers 10 ms typical and 12 ms maximum of transfer time. I am sure this will be much better that the OP's inverter transfer time which states 20ms but no one knows for sure what the actual time is.
Click to expand...
Provided it delivers sine wave
Heisen said:
A battery powered oscilloscope is perfect for this scenario to measure the AC signal right at amplifier power pins, then you intentionally drop the main power switch of your home to simulate the switch to your inverter and observe the waveform and see what kind of delay are we getting or it is even a delay or something else. But all this is out of the scope of this thread.
Click to expand...
Any recommendations for a battery powered oscilloscope?
 
Any chance one of those Meco power measure devices will provide momentary charge to hold the AVR powered on for 20ms switchover?
 
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